Dell OptiPlex 9020 (Mid 2013) - Manual (Page 3)

Small Form Factor — Front and Back View
Figure 3. Back Panel view of Small Form Factor
1. optical drive
2. optical-drive eject button
3. power button, power light
4. USB 2.0 connectors (2)
5. USB 3.0 connectors (2)
6. microphone connector
7. headphone connector
8. drive activity light 9. padlock ring
10. security-cable slot
11. power connector
12. power-supply diagnostic button
13. power-supply diagnostic light
14. back panel connectors
15. expansion-card slots (2)
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